Dietary vitamin A requirement of juvenile Amur sturgeon (Acipenser schrenckii)

文献类型： 外文期刊

第一作者： Wen, H.

作者： Wen, H.;Jiang, M.;Wei, Q. W.;Wen, H.;Yan, A. S.;Wei, Q. W.;Gao, Q.

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期刊名称：JOURNAL OF APPLIED ICHTHYOLOGY （ 影响因子：0.892； 五年影响因子：0.956 ）

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收录情况： SCI

摘要： The present experiment was conducted to determine the dietary vitamin A requirement of juvenile Amur sturgeon (Acipenser schrenckii) by formulating seven semipurified diets containing 10, 258, 510, 1050, 2020, 4100 and 8300 IU vitamin A (as retinol acetate) kgp# diet, respectively. Each experimental diet was fed to triplicate groups of 20 juveniles each with initial average weights of 12.09 pl 0.22 g in 405-L aquaria and maintained at 25.0 pl 2.0pC for 8 weeks. Fish fed the basal diet (10 IU vitamin A kgp# diet) exhibited poor appetite and activity, whereas these signs were not observed in any group fed vitamin A-supplemented diets. Weight gain, feed efficiency and hepatosomatic index increased significantly with increases in the dietary vitamin A level, reaching a peak with the vitamin A 1050 IU kgp# diet, and then decreasing. Muscle chemical compositions were not affected by the dietary vitamin A levels. Vitamin A concentrations in liver and muscle increased significantly as the vitamin A levels increased within a range of 10~4100 IU kgp# diet; above this level there were no significant changes. Broken-line regression analysis of weight gain and liver vitamin A concentration against the dietary vitamin A level showed that juvenile Amur sturgeon required a minimum of 923 IU vitamin A kgp# in the diet for maximal growth, and 1981 IU kgp# for highest liver vitamin A accumulation.

分类号： Q959.4

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